williamson



@einen gioire @anni @fitta M. v.- n. WILLIAMSON, or JAMnsronT, 'NnwvonnLetters Patent No. 74,470, dated 'February 11, 1868.

turnovsnsnr In nnAUenr-EQALIZER ron DOUBLE-'Tanna TO ALL WHOM IT MAYCOlmlilRl':` v 1 I y Be it known that I, M. V. B. WILLIAMSON, ofJamesport, inthecounty of Suffolk, 'aadstatev of New York, have inventedlcertain Improvements in a Diaught-llqnalizerfor Double-'.llrees;4 and Ido hereby declare that `the following is 'a full and exact descriptionthereei', reference being had to the accompanyingdrawings, and

to the letters of reference marked thereon.

TheV object oifmy invention is to dispense altogether with single-trees,and at the same time to produce a means for attaching draughtfanimals tothevehicle or other articlerto be drawn, in'a superior manner,` so thatVtheir labor shall be m'ade easier forV the animals, 'the liability oftheir becoming chafed, which exists in the ordinary manner of hithingthem, obviated, and so that the motion of one animal shall notl operateso much to the detriment of the esta, ashes haben() been the cass.

It is also the object of my invention to prevent the twisting strain onthe double-tree and centre-bolt which exists in the apparatus patentedby G. G.Brad1ey, December 3, 1861, and to` bring the rear of the insidetugs or chains up levell with the end of the outside ones, to obtain amore equal and direct application of the force y of the animals to thework to be done, instead of having them more than the thickness of thedouble-'tree below or above the rear ends ofthe outside ones, as in' theinvention above named. i

It' consists in connecting the inside tugs or chains together aroundapulley or swivel'at a point forward of the double-tree; also in hanging`or securing the said pulley in a swinging clevis orloop, which swingslaterally on a centre coincident, or nearly so, withthe centre of thedouble-tree. In the accompanying drawings- Figure 1 is 'a top view of a-draught-,equalizer and d`ouble-tree constructed accordingto myinvention.

`Figure 2 is a front view of the same. l p

In fig. 1 the inside chains, the pulley, and the clevis are shown inblack drawing tothe front, and drawing to either side in colors. y y i Ais a double-tree, which issiniilar to those now in use, except that itis longer, in order to receive the ends of the outside Ychains at itsouter ends, and still have the chains far enough apart, though a varietyof forms may be'used, as, for example, a slightly bow-shaped double-treewould be of' advantage for some purposes'. d are the inside tugs orlchains connected together around the pulley B, which, instead of beingunderneaththe double-tree, or ,above it, as described iu the patent ofC. C. Bradley, December 3,1861, is directlyu'n front of it, and levelwith it, which brings the inside chains d-up level with the outsidechains, thus removing the twist ing strainrfroni the collars of theanimals, from the bolt a, und from the double-tree, and causingthe force`exertedby the animals to operate squarely and evenly o'n the work to bedonc. The pulley B yis hung loosely `on the pin c in the forward part ofthe clevis or arms b, so'thatthe said pulley will turn freely on the pin@and thusreduce the friction of the chains d as they pass through thesaid'clevis. The arms and pin c, making a loop'or clevis for the chainsdto be connected through, are hung loosely on the bolt a, so that `itwill swing laterally to accommodate the motionoil the horses, and alwayskeep the line of draught of the linside chains from the bolt a directlyto the front. It also divides the shock of any sudden lateral motionof'eitherhorse, so that, the strain on the shoulders of each will b`eless. To use this double-tree andfdraught-equalizer without a tongueorpole, as for street-cars, for which purpose itis'peculiarly adapted, aloop or clevis should be hung on the bolt a, projecting to the rear,and, if deemed best, elink or ring can be attached to said4 clevis to.hook on with.

The advantages which my draught-equaliz er possesses over others now inuse are, first, it dispenses entirely with siugle-trees,'which reducesthe numbers of parts nearly, or quite, one h alf, and thus renders theapparatus simpler and cheaper; second, by doing away with'single-trcesthe rear part of the horses legs `are saved from much chaiing andbruising, which the said-single-trees have hitherto occasioned bystriking and rubbingaganst them; thi1d,fthe pulley, aroundwhich the tugsare connected, being hung-as'set forth, the said inside tgs or chainsare steadier, being shorter, and consequently they are less likely tostrike against the sides of the horses legs and chaie them; fourth, theclevis or arms b being pivoted,so aste have alateral motion, theapparatus is easier for the horses, as the motion of one horsetothefront or laterally compensates for. that of the other, and the lineof draught from the bolt a is always directly forward; fifth, th creislno twistingstrain on the bolt a, the doubleftree, or the collar,occasioned by the pulley-'13beingabove or below therline of draught, asin the invention of Bradley above mentioned. This and other objectionsto the apparatus of Bradley have prevented its coming into use.

Having thus fully described my invention, I claim- 1. Hanging the pulleyBfoisvzird ofthe ,double-tree, substantially :is andfor the purposesei:v f orth. 2. So constructing and attaching the arms or clevs I as toallow them und the pulley B to have free lateral Vibratory motion fromthe bolt a as a. centre, substantially ds hereinabove speoiied.

' M. V. B. WILLIAMSON. Witnesses:

H. JAMES WESTON, R. H. SEATON.

